| Rank |
Congressional District |
Population (2012) |
| 1 |
California 42nd Congressional District
|
745,833
|
| 2 |
California 51st Congressional District
|
738,513
|
| 3 |
California 18th Congressional District
|
736,397
|
| 4 |
California 15th Congressional District
|
732,515
|
| 5 |
California 30th Congressional District
|
729,053
|
| 6 |
California 28th Congressional District
|
727,828
|
| 7 |
California 41st Congressional District
|
726,487
|
| 8 |
California 11th Congressional District
|
726,253
|
| 9 |
California 53rd Congressional District
|
725,892
|
| 10 |
California 14th Congressional District
|
725,771
|
| 11 |
California 9th Congressional District
|
724,666
|
| 12 |
California 31st Congressional District
|
724,413
|
| 13 |
California 45th Congressional District
|
724,219
|
| 14 |
California 29th Congressional District
|
722,810
|
| 15 |
California 47th Congressional District
|
722,624
|
| 16 |
California 20th Congressional District
|
721,890
|
| 17 |
California 50th Congressional District
|
721,337
|
| 18 |
California 7th Congressional District
|
719,962
|
| 19 |
California 13th Congressional District
|
719,569
|
| 20 |
California 17th Congressional District
|
719,276
|
| 21 |
California 39th Congressional District
|
718,996
|
| 22 |
California 32nd Congressional District
|
718,635
|
| 23 |
California 35th Congressional District
|
718,067
|
| 24 |
California 46th Congressional District
|
717,993
|
| 25 |
California 48th Congressional District
|
717,809
|
| 26 |
California 25th Congressional District
|
717,685
|
| 27 |
California 22nd Congressional District
|
717,545
|
| 28 |
California 12th Congressional District
|
717,042
|
| 29 |
California 24th Congressional District
|
716,974
|
| 30 |
California 16th Congressional District
|
716,746
|
| 31 |
California 37th Congressional District
|
716,299
|
| 32 |
California 5th Congressional District
|
715,809
|
| 33 |
California 38th Congressional District
|
715,745
|
| 34 |
California 44th Congressional District
|
714,989
|
| 35 |
California 36th Congressional District
|
714,975
|
| 36 |
California 49th Congressional District
|
714,647
|
| 37 |
California 6th Congressional District
|
714,536
|
| 38 |
California 23rd Congressional District
|
713,959
|
| 39 |
California 10th Congressional District
|
713,348
|
| 40 |
California 19th Congressional District
|
712,983
|
| 41 |
California 21st Congressional District
|
712,866
|
| 42 |
California 3rd Congressional District
|
712,075
|
| 43 |
California 26th Congressional District
|
711,999
|
| 44 |
California 1st Congressional District
|
711,354
|
| 45 |
California 27th Congressional District
|
710,190
|
| 46 |
California 8th Congressional District
|
708,578
|
| 47 |
California 34th Congressional District
|
708,100
|
| 48 |
California 52nd Congressional District
|
704,272
|
| 49 |
California 4th Congressional District
|
704,230
|
| 50 |
California 2nd Congressional District
|
704,148
|
| 51 |
California 33rd Congressional District
|
701,029
|
| 52 |
California 43rd Congressional District
|
697,985
|
| 53 |
California 40th Congressional District
|
694,514
|